Originally produced in Barcelona as a 3-episode Spanish-language serial (clearly inspired by the Fantômas and Les Vampire serials), but more than half of that footage is lost. This version is a reduction of the serial into a feature film for German-language viewers. Gaps are filled by text from the original scenario - in Spanish. So expect a rough ride: choppy action with frequent jump cuts, action replaced by stills and text, and titles switching between German and Spanish (held together here with English subtitles from machine translation). 

The reward for hanging in there is an earnest female-tied-to-the-train-tracks scene - to counter the claim that such scenes were already outdated and obsolete before the silent fim era (see The Bioscope: Tied to the tracks).